dart:io | Change File.fullPath to FileSystemEntity.resolveSymbolicLinks.

sdk/lib/io/directory_impl.dart

Index: sdk/lib/io/directory_impl.dart
diff --git a/sdk/lib/io/directory_impl.dart b/sdk/lib/io/directory_impl.dart
index f54a6413c1e938fc9b2d7ef8b85038f9caff18d8..e5293f6d2c0892780055e8908cde1155729ac87d 100644
--- a/sdk/lib/io/directory_impl.dart
+++ b/sdk/lib/io/directory_impl.dart
@@ -13,6 +13,7 @@ class _Directory extends FileSystemEntity implements Directory {
   static const LIST_NEXT_REQUEST = 5;
   static const LIST_STOP_REQUEST = 6;
   static const RENAME_REQUEST = 7;
+  static const RESOLVE_SYMBOLIC_LINKS_REQUEST = 8;
 
   final String path;
   SendPort _directoryService;
@@ -204,6 +205,29 @@ class _Directory extends FileSystemEntity implements Directory {
     }
   }
 
+  Future<String> resolveSymbolicLinks() {
+    _ensureDirectoryService();
+    List request = new List(2);
+    request[0] = RESOLVE_SYMBOLIC_LINKS_REQUEST;
+    request[1] = path;
+    return _directoryService.call(request).then((response) {
+      if (_isErrorResponse(response)) {
+        throw _exceptionOrErrorFromResponse(response,
+                                            "Cannot resolve symbolic links");
+      }
+      return response;
+    });
+  }
+
+  String resolveSymbolicLinksSync() {
+    var result = _File._resolveSymbolicLinks(path);
+    if (result is OSError) {
+      throw new DirectoryException(
+          "Cannot resolve symbolic links", path, result);
+    }
+    return result;
+  }
+
   Future<Directory> rename(String newPath) {
     _ensureDirectoryService();
     List request = new List(3);